How to Hide BudgetGuard Admin Menus

function plt_hide_budgetguard_menus() {
	//Hide the "BudgetGuard" menu.
	remove_menu_page('budgetguard');
	//Hide the "BudgetGuard → BudgetGuard" menu.
	remove_submenu_page('budgetguard', 'budgetguard');
	//Hide the "BudgetGuard → Settings" menu.
	remove_submenu_page('budgetguard', 'budgetguard-settings');
}

add_action('admin_menu', 'plt_hide_budgetguard_menus', 11);

Where do I put this code?